Percentages Mental Math

20% of 32?

10% of 549?

20% of 35?

Write 5cm as a percentage of 20cm

• 25%

• 40%

• 10%

• 20%

Write 7 days as a percentage of 10 days

• 35%

• 7%

• 70%

• ⁷/₁₀

Write 27 as a percentage of 50

• 54%

• 27%

• 46%

• 18.5%

Write 3g as a percentage of 20g

• 15%

• 12%

• 3%

• 60%

Write 164 as a percentage of 200

• 82%

• 16.4%

• 32.8%

• 80%

Write 60 marks out of 80 marks as a percentage

• 60%

• 75%

• 80%

• 20%

Find 5% of 30

• 15

• 1.5

• 0.15

• 150